EXPLANATION OF PLATES 



PLATE XVIII. 



Figs. 1, 2. Xestolebcris dispar. 



1. Shell of female. X 105. 



2. Shell of male. X 105. 

 Figs. 3-12. Paracytheroma pedrensis. 



3. Shell of male. X 105. 



4. Portion of anterior edge of shell. X 255. 



5. Antennule. X 255. 



6. Mandible. X 135. 



7. Maxilla of male. X 52. 



8. Leg of first pair. X 200. 



9. Leg of second pair. X 200. 



10. First joint of leg of third pair. X 200. 



11. Postabdomen of female. X 150. 



12. Postabdomen and penis of male. X 160. 



Figs. 13-15. Philomedes longiseta, male. 



13. Shell. X 37. 



14. Secondary branch of antenna. X 120. 



15. Furca. X 60. 



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